Zie ook in gerelateerde artikelen

Zie ook artikelen met ctDNA in de titel op onze website: https://kanker-actueel.nl/NL/search.html?search_text=ctDNA&search_in=title

2 juni 2026: Bron: N Engl J Med 2025;393:569-580

Wanneer bij borstkankerpatiënten met ER positief en Her2 negatief via een ctDNA bloedtest tijdens de behandeling met CDK4/6 remmers een ESR1 mutatie wordt vastgesteld en zij overstappen naar Camizestrant dan verbetert de ziekteprogressievrije tijd en is de kans aan de ziekte te overlijden duidelijk minder in vergelijking met de groep die aromataseremmers verder gebruikte. De mediane tijd tot een verslechtering van de door de patiënt gerapporteerde algehele gezondheidstoestand en kwaliteit van leven was 21,0 maanden met Camizestrant en 6,4 maanden met een aromataseremmer. Aldus blijkt uit de resultaten van de fase III Serena-6 studie

Pikant is wel dat de FDA tot nu toe weigert Camizestrant goed te keuren tijdens de ODAC (zie de video) wat de EMU wel al heeft gedaan. 

Op de website  van Astrazeneca wordt de studiepublicatie uitvoerig beschreven en toegelicht:

Camizestrant combination delayed time to first progression by 55% and to second progression by 37% in patients with advanced HR-positive breast cancer with an emergent ESR1 tumour mutation in SERENA-6 trial

Switching to camizestrant led to a 99% median reduction in total ctDNA vs. a 64% increase for patients who remained on standard of care

51% of patients receiving the camizestrant combination achieved total ctDNA clearance vs. 1.9% with standard of care – early total ctDNA clearance was associated with an improvement in long-term outcome

Further positive results from the Phase III SERENA-6 trial showed AstraZeneca's camizestrant plus a cyclin-dependent kinase (CDK) 4/6 inhibitor – palbociclib, ribociclib or abemaciclib – maintained its progression-free survival (PFS) benefit with longer follow-up and delivered a statistically significant and clinically meaningful improvement in second progression-free survival (PFS2), demonstrating sustained benefit beyond initial treatment. Additionally, exploratory analyses showed that the camizestrant combination profoundly reduced total circulating tumour DNA (ctDNA) and enabled substantially more patients to achieve total ctDNA clearance.>>>>>>>lees verder


Op ASCO 2026 is het abstract gepubliceerd:
First-line (1L) camizestrant (CAMI) for emergent ESR1 mutations (ESR1m) in advanced breast cancer (ABC): Final progression-free survival 2 (PFS2) from the phase III SERENA-6 trial.

Francois Clement Bidard

Institut Curie, Paris, France


Background:

CAMI is a next-generation SERD and complete ER antagonist. SERENA-6 enrolled patients (pts) with HR+/HER2− ABC receiving 1L aromatase inhibitor (AI) + CDK4/6i and without disease progression. Switching to CAMI, with continued CDK4/6i, at ESR1m emergence during 1L AI + CDK4/6i significantly improved PFS (HR: 0.44 [95% CI: 0.31–0.60]; p<0.0001; median follow-up: 12.6 mo). Here, we report the final PFS2 results.

Methods:

SERENA-6 was powered for PFS (primary endpoint) and the key secondary endpoint of investigator-assessed PFS2 (time from randomization to the earliest of disease progression after first subsequent therapy or death). Pts had scans to assess PFS2 every 8–12 weeks after first progression. PFS2 analysis was planned after ~158 PFS2 events (77% power to detect HR of 0.65) and analyzed using an adjusted log-rank test and a 2-sided significance level of ~5%. Chemotherapy/ADC-free survival was a secondary endpoint.

Results:

157 pts were randomized to CAMI + CDK4/6i and 158 pts to AI + CDK4/6i. After 23.5 mo median follow-up (data cutoff: Jan 3, 2026), median PFS2 was 25.7 mo with CAMI + CDK4/6i vs 19.1 mo with AI + CDK4/6i; statistically significant improvement, HR: 0.63 (95% CI: 0.46–0.86); p=0.00373 (Table). Endocrine-based therapy was the most common first subsequent treatment (CAMI + CDK4/6i arm, 55.2%; AI + CDK4/6i arm, 66.7%).

CAMI + CDK4/6i prolonged chemotherapy/ADC-free survival (HR: 0.64 [95% CI: 0.47–0.87]; nominal p=0.00375; Table) and TTD in GHS/QoL (0.48 [0.31–0.76]); nominal p<0.001).

PFS benefit with CAMI + CDK4/6i was maintained with longer follow-up (Table); 30-mo PFS rate was 30.4% vs 2.7% with continued AI + CDK4/6i. PFS benefit was not impacted by common co-mutations (PIK3CA in 41.3% of pts, HR: 0.44 [95% CI: 0.28–0.68]; TP53 in 25.4% of pts, 0.49 [0.30–0.82]). At 30% maturity, OS HR was 0.87 (0.57–1.30).

Safety was consistent with previous results.

Conclusions:

Switching to CAMI + CDK4/6i at ESR1m emergence continued to result in PFS benefit, with approximately a third of pts still progression-free at 30 mo. PFS benefit was maintained beyond first progression; PFS2 was significantly improved and the clinically meaningful endpoint of chemotherapy/ADC-free survival was prolonged vs continuing AI + CDK4/6i. These results continue to support a switch to CAMI + CDK4/6i for pts with ESR1m during 1L therapy to delay disease progression and deteriorations in QoL.

DCO3

 

CAMI + CDK4/6i (n=157)

AI + CDK4/6i (n=158)

HR (95% CI)

PFS

Events, n (%)

Median, mo

24-mo rate, %

30-mo rate, %

99 (63.1)

16.8

34.9

30.4

124 (78.5)

9.2

14.2

2.7

0.45 (0.34–0.59); p<0.00001

PFS2

Events, n (%)

Median, mo

24-mo rate, %

30-mo rate, %

80 (51.0)

25.7

50.8

41.5

90 (57.0)

19.1

36.3

29.7

0.63 (0.46–0.86); p=0.00373

Chemotherapy/ADC-free survival

Events, n (%)

Median, mo

85 (54.1)

22.6

98 (62.0)

18.7

0.64 (0.47–0.87); nominal p=0.00375

Disclaimer

This material on this page is ©2026 American Society of Clinical Oncology, all rights reserved. Licensing available upon request. For more information, please contact licensing@asco.org

Het studierapport van de Serena-6 studie is vorig jaar gepubliceerd in the New England of Medicin en een update is op ASCO 2026 gepubliceerd.

Het abstract in NEJM uit 2025 is:

First-Line Camizestrant for Emerging ESR1-Mutated Advanced Breast Cancer

Authors: François-Clément Bidard, M.D., Ph.D. https://orcid.org/0000-0001-5932-8949, Erica L. Mayer, M.D., M.P.H. https://orcid.org/0000-0001-5430-8957, Yeon Hee Park, M.D., Ph.D., Wolfgang Janni, M.D., Ph.D., Cynthia Ma, M.D., Ph.D., Massimo Cristofanilli, M.D. https://orcid.org/0000-0002-4194-7175, Giampaolo Bianchini, M.D., +18 , for the SERENA-6 Study Group*Author Info & Affiliations
Published June 1, 2025
N Engl J Med 2025;393:569-580
DOI: 10.1056/NEJMoa2502929

Abstract

Background

Mutations in ESR1 are the most common mechanism of acquired resistance to treatment with an aromatase inhibitor plus a cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitor for advanced breast cancer. Camizestrant, a next-generation selective estrogen-receptor (ER) degrader and complete ER antagonist, has shown antitumor activity in ER-positive advanced breast cancer.

Methods

We tested patients with advanced breast cancer with ER-positive, human epidermal growth factor receptor 2 (HER2)–negative tumors for ESR1 mutations in circulating tumor DNA (ctDNA) once every 2 to 3 months. All the patients had received at least 6 months of first-line therapy with an aromatase inhibitor plus a CDK4/6 inhibitor (palbociclib, ribociclib, or abemaciclib). Patients who were found to have an ESR1 mutation and did not have radiologic progression were assigned in a 1:1 ratio to switch to camizestrant (75 mg once daily) with a continued CDK4/6 inhibitor plus placebo in place of an aromatase inhibitor or to continue to receive an aromatase inhibitor plus a CDK4/6 inhibitor plus placebo in place of camizestrant. The primary outcome was investigator-assessed progression-free survival.

Results

A total of 3256 patients were tested for an ESR1 mutation. The 315 eligible patients were assigned to switch to camizestrant (157 patients) or to continue to receive an aromatase inhibitor (158 patients). At an interim analysis at a median follow-up of 12.6 months, the median progression-free survival was 16.0 months (95% confidence interval , 12.7 to 18.2) in the camizestrant group and 9.2 months (95% CI, 7.2 to 9.5) in the aromatase-inhibitor group (hazard ratio for progression or death, 0.44; 95% CI, 0.31 to 0.60; P<0.0001). The median time until a deterioration in the patient-reported global health status and quality of life occurred was 21.0 months with camizestrant and 6.4 months with an aromatase inhibitor (hazard ratio, 0.54; 95% CI, 0.34 to 0.84). The frequency of discontinuation because of adverse events was 1.3% with camizestrant and 1.9% with an aromatase inhibitor.

Conclusions

In patients with ER-positive, HER2-negative advanced breast cancer with an ESR1 mutation that emerged during treatment, those who were switched to camizestrant with continuation of a CDK4/6 inhibitor during first-line therapy had significantly longer progression-free survival than those who maintained the aromatase-inhibitor combination. (Funded by AstraZeneca; SERENA-6 ClinicalTrials.gov number, NCT04964934.)

Notes

This article was published on June 1, 2025, and updated on July 24, 2025, at NEJM.org.
A data sharing statement provided by the authors is available with the full text of this article at NEJM.org.
Supported by AstraZeneca. Dr. Bidard is supported by a grant (ANR-23-IAHU-0006) from the Women’s Cancer Institute of Institut Curie.
Disclosure forms provided by the authors are available with the full text of this article at NEJM.org.
We thank the patients who participated in this trial, along with their families and caregivers; the members of the trial steering committee, the data and safety monitoring committee, and the AstraZeneca SERENA-6 trial team; and Leigh-Ann Booth, Ph.D., and Suzanne Patel, Ph.D., of BOLDSCIENCE for providing medical-writing support.

Supplementary Material

Protocol (nejmoa2502929_protocol.pdf)
Supplementary Appendix (nejmoa2502929_appendix.pdf)
Disclosure Forms (nejmoa2502929_disclosures.pdf)
Data Sharing Statement (nejmoa2502929_data-sharing.pdf)

References

  1. Bidard FC, et al. First-Line Camizestrant for Emerging ESR1-Mutated Advanced Breast Cancer. N Engl J Med 2025; DOI: 10.1056/NEJMoa2502929.
  2. Chia SKL, et al. On-treatment (tx) dynamic circulating tumor DNA changes (∆ctDNA) associated with progression-free survival (PFS) and overall survival (OS) of patients (pts) with HR+/HER2− advanced breast cancer (ABC) in MONALEESA-3 (ML-3). J Clin Oncol 2024;42(16_suppl):1012.
  3. Fuentes-Antrás J, et al. Personalized ctDNA monitoring in metastatic HR+/HER2− breast cancer patients during endocrine and CDK4/6 inhibitor therapy. npj breast cancer 2025;11:74.
  4. Bray F, et al. Global cancer statistics 2022: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin. 2024; 1- 35. DOI:10.3322/caac.21834.
  5. National Cancer Institute. Cancer Stat facts: Female breast cancer subtypes. Available at: https://seer.cancer.gov/statfacts/html/breast-subtypes.html. Accessed June 2026.
  6. Scabia V, et al. Estrogen receptor positive breast cancers have patient specific hormone sensitivities and rely on progesterone receptor. Nat Commun. 2022; 10.1038/s41467-022-30898-0.
  7. Cerner CancerMPact database. Accessed June 2026.
  8. Lin M, et al. Comparative Overall Survival of CDK4/6 Inhibitors Plus Endocrine Therapy vs. Endocrine Therapy Alone for Hormone receptor-positive, HER2-negative metastatic breast cancer. J Cancer. 2020; 10.7150/jca.48944.
  9. Lloyd M R, et al. Mechanisms of Resistance to CDK4/6 Blockade in Advanced Hormone Receptor–positive, HER2-negative Breast Cancer and Emerging Therapeutic Opportunities. Clin Cancer Res. 2022; 28(5):821-30.
  10. Brett O, et al. ESR1 mutation as an emerging clinical biomarker in metastatic hormone receptor‑positive breast cancer. Breast Cancer Res. 2021; 23:85.
  11. Zundelevich A, et al. ESR1 mutations are frequent in newly diagnosed metastatic and loco-regional recurrence of endocrine-treated breast cancer and carry worse prognosis. Breast Cancer Res. 2020; 22:16.

Plaats een reactie ...

Reageer op "Camizestrant geeft uitstekende resultaten na ctDNA test op ESR1-mutaties tijdens behandeling met een CDK4/6-remmer bij patienten met borstkanker ER positief en Her2 negatief"


Gerelateerde artikelen
 

Gerelateerde artikelen

20-Year Risks of Breast-Cancer >> Algemeen: Aromataseremmers >> Welke Kinaseremmer het beste >> Abemaciclib, een CDK4/6-remmer, >> Alisertib in combinatie met >> Alpelisib (Piqray) naast fulvestrant >> Arimidex - anastrozole, een >> Aromasin - exemestane geeft >> Avastin - bevacizumab faalt >> Borstkanker: Vrouwen met hormoongevoelige >>